Polymer gel dosimeter based on itaconic acid

FACUNDO MATTEA; DAVID CHACÓN; JOSÉ VEDELAGO; MAURO VALENTE; MIRIAM C. STRUMIA

APPLIED RADIATION AND ISOTOPES

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2015 vol. 105 p. 98 - 104

0969-8043

A new polymeric dosimeter based on itaconic acid and N, N?-methylenebisacrylamide was studied. Thepreparation method, compositions of monomer and crosslinking agent and the presence of oxygen in thedosimetric system were analyzed. The resulting materials were irradiated with an X-ray tube at 158 cGy/min, 226 cGy min and 298 cGy/min with doses up to 1000 Gy. The dosimeters presented a linear re-sponse in the dose range 75?1000 Gy, sensitivities of 0.037 1/Gy at 298 cGy/min and an increase in thesensitivity with lower dose rates. One of the most relevant outcomes in this study was obtaining differentmonomer to crosslinker inclusion in the formed gel for the dosimeters where oxygen was purged duringthe preparation method. This effect has not been reported in other typical dosimeters and could beattributed to the large differences in the reactivity among these species.